If you have the private key then you should be fine! 😃)
Shout-out to /u/Fulvio55 for this writeup:
All you need is a text file to put your wallets in, like this example from https://walletgenerator.net/?currency=Dogecoin
Use https://coinb.in/#settings to move coins. ELI5. Download both sites and run them offline.
Use https://bitinfocharts.com/dogecoin/ to check balances and transactions.
See this guide or this video for coinb.in tutorials.
And read the ELI5s (and /u/Fulvio55's history) for more info.